When you take the square root of 2 using the math library's sqrt function, you get a floating point approximation because it's not a perfect square and it's an irrational number.

Libraries are collections of shared code. They're common in Python, where they're also called "modules," but they're also ...

Many programming languages include libraries to do more complicated math. You can do statistics, numerical analysis or handle big numbers. One topic many programming languages have difficulty with is ...